Good morning 40...
Airstones are mainly for show and add little to the tank. You don't need air bubbling. If you like the look, there are air driven water filters on the market that will release bubbles into the water.
If you're after more water surface movement and more aeration, it would be better to keep the airstone out of the tank and simply get a little larger water filter.
"Fear not, my young apprentice. Just change the tank water."